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1194 Aletta (1931 JG)
Classification: Main-belt Asteroid          SPK-ID: 2001194
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09089800536969322 1.7798e-08  
a 2.913563900032426 1.1129e-08 au
q 2.648726753002334 4.9104e-08 au
i 10.86931832719304 5.7035e-07 deg
node 291.2959288483279 3.8704e-06 deg
peri 243.7046264515498 1.195e-05 deg
M 94.52921300849084 1.0467e-05 deg
tp 2458919.521515349476
(2020-Mar-11.02151535)
5.2641e-05 TDB
period 1816.499355165105
4.97
1.0408e-05
2.85e-08
d
yr
n .19818338992324 1.1355e-09 deg/d
Q 3.178401047062518 1.2141e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2735  
   data-arc span      32906 days (90.09 yr)  
   first obs. used      1931-05-20  
   last obs. used      2021-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37186  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:04:45  

Additional Information
 Earth MOID = 1.67736 au 
 Jupiter MOID = 1.93268 au 
 T_jup = 3.250 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.71   n/a MPCxxxxx  
diameter diameter 41.358 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 20.39 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Brinsfield, J.W. (2008) Minor Planet Bull. 35, 86-87.]
[Oey, J. (2011) Minor Planet Bull. 38, 221-223.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.087   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1194 Aletta (1931 JG)          Discovered 1931-May-13 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1931 JG = 1946 KC = 1962 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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